if (document.images) {
  but1on = new Image();
  but1on.src = "MenuCode/on1.gif";
  but2on = new Image();
  but2on.src = "MenuCode/on2.gif";
  but3on = new Image();
  but3on.src = "MenuCode/on3.gif";
  but4on = new Image();
  but4on.src = "MenuCode/on4.gif";
  but5on = new Image();
  but5on.src = "MenuCode/on5.gif";
  but6on = new Image();
  but6on.src = "MenuCode/on6.gif";
  but7on = new Image();
  but7on.src = "MenuCode/on7.gif";
  but8on = new Image();
  but8on.src = "MenuCode/on8.gif";
  but9on = new Image();
  but9on.src = "MenuCode/on9.gif";
  but10on = new Image();
  but10on.src = "MenuCode/on10.gif";
  but11on = new Image();
  but11on.src = "MenuCode/on11.gif";
  but12on = new Image();
  but12on.src = "MenuCode/on12.gif";
  but13on = new Image();
  but13on.src = "MenuCode/on13.gif";
  but14on = new Image();
  but14on.src = "MenuCode/on14.gif";



  but1off = new Image();
  but1off.src = "MenuCode/off1.gif";
  but2off = new Image();
  but2off.src = "MenuCode/off2.gif";
  but3off = new Image();
  but3off.src = "MenuCode/off3.gif";
  but4off = new Image();
  but4off.src = "MenuCode/off4.gif";
  but5off = new Image();
  but5off.src = "MenuCode/off5.gif";
  but6off = new Image();
  but6off.src = "MenuCode/off6.gif";
  but7off = new Image();
  but7off.src = "MenuCode/off7.gif";
  but8off = new Image();
  but8off.src = "MenuCode/off8.gif";
  but9off = new Image();
  but9off.src = "MenuCode/off9.gif";
  but10off = new Image();
  but10off.src = "MenuCode/off10.gif";
  but11off = new Image();
  but11off.src = "MenuCode/off11.gif";
  but12off = new Image();
  but12off.src = "MenuCode/off12.gif";
  but13off = new Image();
  but13off.src = "MenuCode/off13.gif";
  but14off = new Image();
  but14off.src = "MenuCode/off14.gif";

}

function butOn(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "on.src");
    
  }
}

function butOff(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "off.src");
  }
}